ABB S203P-Z3 three pole 3 A Z curve miniature circuit breaker from the System pro M compact S200P range, designed for reliable overload and short-circuit protection of sensitive low-current circuits in commercial and industrial electrical installations.
The ABB S203P-Z3 is a high-performance three-pole miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide precise protection against overloads and short circuits in commercial and industrial electrical installations. Its current limiting construction makes it suitable for control panels, distribution boards and sensitive low-current circuits requiring dependable fault protection.
This circuit breaker features a Z curve tripping characteristic, making it suitable for sensitive circuits where fast response to low fault currents is required. It is commonly used for electronic equipment, control systems, instrumentation circuits and semiconductor-related applications where rapid disconnection helps protect connected equipment.
With a 3 A rated current, three-pole configuration and 25 kA rated short-circuit capacity at 230 / 400 V AC, the S203P-Z3 provides robust protection for low-current three-phase circuits while maintaining the compact installation flexibility expected from ABB’s professional miniature circuit breaker range.
The ABB S203P-Z3 protects electrical circuits by automatically disconnecting the supply during overload or short-circuit conditions. Its delayed thermal tripping mechanism protects against overloads, while its electromechanical magnetic tripping mechanism provides rapid response during fault conditions.
The Z curve characteristic is designed for circuits where fast tripping at low short-circuit currents is important. This makes the breaker suitable for protecting sensitive electronic loads, control systems, instrumentation and circuits where equipment damage must be minimised.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Part Number/SKU | S203P-Z3 |
| Poles | 3 |
| Current Rating | 3A |
| Trip Characteristic | Z-Type |
| Shunt Trip | Yes |
The S203P-Z3 is used to protect low-current three-phase electrical circuits against overloads and short circuits, especially where sensitive equipment requires fast disconnection during fault conditions.
This model has a 3 A rated current.
A Z curve breaker provides fast magnetic tripping at low fault currents, making it suitable for sensitive electronic circuits, control systems and instrumentation applications.
The S203P-Z3 has a 25 kA rated short-circuit capacity at 230 / 400 V AC.
The breaker is designed for DIN rail mounting inside electrical distribution boards, control cabinets and industrial panels.
ABB System pro M compact S200P miniature circuit breakers are trusted by panel builders, electrical contractors and automation engineers for dependable protection, compact installation and long-term reliability in commercial and industrial applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...